.shared whiteboard.For example, a city hall leader said in his blog: "In the application activities of interactive whiteboards in large and medium-sized cities in the country last year, it is expected that the scenes filled in the scene will not appear, and there will even be some large-scale absenteeism." This phenomenon is related to the status quo and use consciousness of teachers in multimedia use. Most of the current teachers have calmed down from the previous CAI frenzy and returned to the rationality of teaching. They think that the choice of media is moderate and sufficient, and most of them use self-made PPT for demonstration and simple interactive activities. Teachers are also very satisfied with such traditional teaching classes. The use of information technology is at a low level, that is, the use of electronic whiteboards, many means only play the role of electronic blackboards, and rarely bring revolutionary changes to the classroom. Teachers use the whiteboard to increase the visual effect of teaching. It is only used as a tool for teaching, and can not be integrated into teaching as an informational means to promote the mastery of students' concepts.